As in any decent SimCity game, in SimCity BuildIt you can buy dozens of different buildings and place them wherever you want. The only requirement when placing a building is that it be connected by roads. You'll have to plan your city with care, because your citizens won't like to live near factories, for example.
If building houses for your inhabitants isn't enough in SimCity BuildIt, you also have to build parks to keep them happy, shops so they can get what they need, power sources so they can have electricity, and water tanks so they can shower, among many other things.
In SimCity BuildIt you can visit other player's cities, too, and not only take a look and see how pretty they are, but also trade with them and get more resources (like wood or iron) that you'll need to improve many of your own buildings.
SimCity BuildIt is a great strategy game with brilliant graphics and a game system that's perfectly adapted to smartphones. The only downside is that you'll find lots of in-app purchases.
Requires Android 2.3.3 or higher